Optical projection apparatus



J. GRANZ.

OPTICAL PROJECTION APPARATUS.

` APPLICATION FILED FEB. 2| |920.

Patented Apr. 19, 1921.

I llllllll l| Ill Il H Il l Eu/enfers Jsepa/Qra/nz,

J.. GRA'NZ.

OPTICAL PROJECTION APPARATUS. APPLICATION FILED FEB. 21,1920. A 1,375,089. Patented Apr. 19, 1921. y 2 SHEETS-SHEET 2.

(I I I: "i I NIH 3 a# 'M mlm III II y wemar, jsepk Grana UNITED STATES PATENT lf`li`ICfli.l

JOSEPH GRANZ, 0F I)T TIIUTEI-I,l MTNNESOTA.

. OPTICAL PROJECTION APPARATUS.

Original application led March 28, 1919, Serial No. 285,760. Divided and this application filed February VSpecification of Letters Patent.

Patented Apr. 19, 71921.`

2i, '1920. serial No. 360,529. g

To all whom it may concern.'

Be it known that I, JOSEPH GuANz, a citizen of Czechoslovakia, and a resident of Duluth, in the county of Saint Louis, State of Minnesota, have inventedV certain new and useful Improvements in Optical Projection Apparatus, of whichthe following is a specification.

yThis invention relates to the lamp house or illuminating means for motion picture machines and like optical projection apparatus, and isa division of my application Serial No. 285,760, filed March 28, 1919. And the objects of the present improvements are:`

To provide a simple and eflicient structural formation andl association of parts whereby a single lamp house is adapted for ready removal and attachment to one or the other of a `motion picture machine and a stereopticon apparatus that have associated relation upon a Vsingle supportingbase.

To providev a light and heat intercepting shutter or dowserl adapted for ready and convenient manual actuation from the rear of the lamp house, and adapted to permit or shut off the passage of the lightand heat rays from the lamp house tothe particular optical projection apparatus to which said lamp house is applied, and as circumstances in actual Vuse mayrequire, all yas will hereinafter more fully appear. i

In the accompanying drawings Figure 1, is a side elevation illustrating the general association of parts in a combined motion picture machine and stereopticon embodying the presentl invention.v

Fig. 2, isa longitudinal sectional elevation of the lamp house on line 2-2 Fig. 4.Y

Fig. 3, isa kfront elevation of said lamp house. `Fi 4, is a horizontal section of the same on line 4-4 Fig. 2.

Like reference numerals indicate like parts in the severalviews.

Referring to the drawings, 1 designates a main shell or casing'formmg'the main chamber of a motion picture machine and adapted tocontain the film Aactuating drums, lm guiding means, etc., of the saine.y

2 anddesignate the respective upper and lower film magazines of the usual drum` form, adapted to receive in a removable and replacable v,IIlftIlIlfbl the usual iilm reels of the machine, and fiXedly secured to upper and lower saddle formations 4 and 5 of the main casing 1. f

6 designates the objective or front lens member of themachine, secured to the front of the casing 1 in a position which brings the optical center of the machine at Vthe mid-height and mid-width of the aforesaid main casing. f

7 designates the condenser or rear lens member of the motion picture machine..` In the present improvement the carrying frame 8 ofthe condenser is of an annular form and is secured to the rear wall ofthe casing 1 by horizontal bracket rods 9, and said carrying frame 8 is provided at its upper end or crown with apvertically extending stud 10 for the purpose hereinafter stated.

11 designates a bracket or brackets secured to one side of the upper film magazine2 and adapted to support a horizontal guideV rail or rails 1.2, at the forward 'end of which is suitably mounted the usual objective or front lens system (notshowm) of a stereopticon or likeoptical projection apparatus, while at the rear end of such rail or rails y12 is suitably mounted the condenser or rear lens member 130i said appaj apparatus, preferably of the rectangular andv shown and prodouble 'wallV construction vided with Ventilating' openings 15 at its lower end, with a'ventilating cowl structure 16 at its upper -end,with a door 17 atits open rear end tothe lamp mechanisms within the lamp house, and with a hand grip 18 at its rearV end for convenient handling of the lamp house. l Y

19 designates the usual light orifice in the front wall of the lamp house 14, the axis of which is adapted to register with the aires or centers of the condensers or `rear lens affording convenient access;

members 7 and 13 heretofore described, and

orifice 19 of the lamp body and forming a` continuation of said orifice 19.

21 designates a segmental or saddle shape bracket flange having fixed attachment to the lamp body 14 and disposed centrally over the light orifices just described. The ange 21 is preferably formed as a part of the aforesaid plate member 20, and is provided with a central vertical orifice adapted to fit over and engage either vertical stud 10 or 10 of the motion picture machine or the stereopticon apparatus, to support the lamp house in proper operative relation with one or the other of said apparatus. lNith the described structure the forward vertical face of the plate member 20 is adapted to bear or abut against the rear face of one or the other carrying frame 8 or 8 of the condensers 7, 13, to aid in a stable attachment of the rlamp house in the two relations just described. 1

22 designates the light intersecting shutter or dowser. above referred to, preferably of a circular disk form pivotally mounted at oneedge upon an operating shaft as follows y23 designates the operating shaft above i referred to, journaled longitudinally in the yflo lamp house 14 and carrying at its forward end the shutter 22 aforesaid, while its rear end extends back of said lamp house and carries an operating hand lever 24 yto provide a convenient means for operating the shutter or dowser 22 from the usual position of the operator at the rear of the projecting apparatus.

25 designates aV sliding block moving in longitudinal guides on the floor portion of the lamp house 14 and adapted for limited longitudinal adjustment by means of an adjusting screw mechanism 26, as illustrated in Fig. 1. In the present construction the sliding head 25 is formed with a pair ofV vertical orifices arranged -in parallel relation, with the shells or walls 27, 28 of said orifices slotted vertically and provided with transverse clamping screws 29, 30 whereby said shells or walls may be circularly constricted to clamp and hold in place the stems or spindles of the lamp parts now to be described. Y

31 designates a supporting stem arranged in a vertically adjustable manner in the orifice of the rearward shell 28 aforesaid,

and adapted tofbe clamped therein by the screw 30. At its upper end the stem 31 supports in a longitudinally adjustable manner the horizontal carrying stem 32 of the reflector 33 of the illuminating means.

34 designates a hand grip or handle havingat its upper end a cylindrical stem 35 adapted for engagement in the orifice of the forward shell 27 aforesaid, and adapted to bezlamped therein by the screw 29 aforesai 36 designates a horizontally arranged yoke member having at one end a sleeveor yoke 37 adapted for attachment to the upper.. portion of the hand grip or handle 34 aforesaid, and at its other end a sleeve or yoke 38 and clamping screw 39 adapted to receive and hold the base or socket portion of the incandescent lamp 40 used as the illumi-` nant in the lamp house.

41 designates an adjustable vstop stem mounted transversely at the mid-length of the yoke member 36 aforesaid and adapted; to have abutment against a fixed lug or flange on the bottom of the lamp house 14, as described in detail in my application for patent Serial No. 285,760, filed March 28, 1919, and of which the present application is a division. The stop stem 41 is Vsecured at its adjustment by a clamping screw 43 and by its adjustment insures the proper positioning of the lamp 40 in a horizontal plane, with relation to the optical center of the lamp house. The adjustment of the lamp 40 in a vertical plane, with relation to, said optical center is attained bythe clamping sleeve 38 and screw 39 above described during the initial assemblage of the clam unit parts heretofore described.

Having thus fully described my said invention, what I claim as new and desire to secure by Letters Patent, is

1. A motion picture machine and an optical projection apparatus secured in associated relation and each provided with an individual condenser at the rear end, each condenser having an inclosing frame, aV single lamp j house provided 1 at Vits forward Y end with a saddle flange, and interengaging means on said saddle flange and the inclosing frames of said condensers for-attaining detachable connection of the lamp house to either of said condensers.

2. A motion picture machine and an optical projection apparatus secured in associated relation and each provided with'an individual condenser at the rear end, each condenser having a vertically projecting pin on the crown of its carrying frame, and a single lamp house provided at its forward end with a saddle flangehaving a central orifice adapted to engage one or the other of the vertical pins of they condensers.

3. A motion picture machine having a condenser mounted at its rear end by horiof the Inainv casino zontal posts connecting the machine and condenser frame together, said condenser having at its crown a central vertical pin, an optical projection apparatus having fixed relation to the motion picture machine and provided at its rear end with a condenser the frame of which is provided at its crown with a central vertical pin, and a single lamp house provided at its forward end with a saddle flange having a central orifice adapted to engage one or the other of the vertical pins of the condensers.

4. A motion picture machine comprising a main casing and associated upper and lower lm magazines and provided with a condenser at its rear end, the frame of said condenser having at its crown a central vertical pin, an optical projection apparatus secured to the side of the upper magazine aforesaid and provi-ded at its rear end with a condenser the frame of which is provided at its crown with a central vertical pin, and a single lamp house provided at its forward end with a saddle flange having a central orice adapted to engage one or the other of the vertical pins of the condensers.

5. A lamp house for optical projection apparatus, comprising a main casing having a light aperture in its front wall, a plate having an aperture alined with the aperture and provided with vertically arranged oset portions at its sides for attachment to the wall of the main casing and providing a chamber-open attop and bottom between the plate and casing to provide free vertical air circulation through the chamber, a shutter of the plate form pivotally mounted in said chamber, and a carrying shaft for said shutter extending rearwardly through the main casing and having an operating handle at its rear end.

6. A lamp house for optical projection apparatus, comprising a main casing having a light aperture in its front wall, a plate having an aperture alined with the aperture of the main casing and provided with vertically arranged offset portions at its sides for attachment to the wall of the main casing and providing a chamber open at top and bottom between the plate and casing to provide free vertical air circulation through the chamber, a shutter of the plate form pivotally mounted in said chamber, a carrying shaft for said shutter extending rearwardly through the main casing and having an operating handle at its rear end, and a supporting saddle bracket secured to the upper portion of said plate and at a point forward and clear of the open top of the chamber formed by such plate.

Signed at Duluth, Minn., this 13th day of February, 1920.

JOSEPH GRANZ. 

